Outline the approval process

Taken from here:

  http://lists.openstack.org/pipermail/transparency/2015-May/000029.html

README.rst

@@ -1,4 +1,29 @@
+--------------------------------------------
+The OpenStack Foundation Transparency Policy
+--------------------------------------------
+
 This repository contains the OpenStack Foundation Transparency Policy.
 
 See https://wiki.openstack.org/wiki/Governance/Foundation/TransparencyCommittee
 for more details.
+
+Approval Process
+----------------
+
+With proposed changes to the policy, the process would roughly be:
+
+#. Someone proposes the changes by checking out the git repo, editing
+   the document, and running the git-review command line too.
+#. Discussion of the changes would happen through the gerrit web
+   interface, with people able to propose changes in line.
+#. The author would respond to that discussion, mostly likely making
+   amendments, and uploading those new reviews to gerrit.
+#. The proposal would be discussed in a committee meeting.
+#. Eventually, the committee members would individually vote +1 on the
+   proposal.
+#. The proposal would be presented to the board, showing the diff, and
+   the end result. Perhaps several changes would be proposed to the
+   board at once.
+#. Each change that is approved by the board is then merged into the
+   repo using the gerrit web interface by either the foundation board
+   chair or the committee chair.